With the arrival of warm April, people travel with masks, not only to prevent pollen catkins allergy, but also to prevent dust in the air and haze.
Over the past few years, deaths due to poor air quality have been increasing year by year, and the air problem has been concerned by people all the time.
The air problem is a global problem. Recently, Yale University's 2018 edition of the Global Environmental performance Index (EPI (Environmental Performance Index) report was released.
What is the basis for judging whether the air quality is good or bad?
The EPI report sets three indicators for the air quality index:
(1) the average value of the national pm2.5 index;
(2) the proportion of the population affected by the Pm2.5 index exceeding the standards of the World Health Organization (WHO);
3, indoor pollution, even the proportion of cooking with traditional fuels.
The darker the color, the better the ai
Global air quality ranking
1. Australia
2. Barbados
3. Jordan
4. Canada
5. Denmark
6. Finland
7. New Zealand
8. Brunei
9. Iceland
10. America
In this ranking, most of the top-ranked countries are Europe, the Americas, such as Australia, New Zealand, the United States and Canada, which are the traditional immigrant countries preferred by the Chinese people. These countries have very low air pollution index (API). The livable index is at the forefront of the world.
Australia, which continues to be the champion, has been known for its good air quality all over the world. Melbourne is the seventh time the world's most livable city has won the trophy.
Let's explore the mystery of Australia's good air quality!
Australia's air transparency is very high, blue sky, white clouds, sky, far-sighted, unstoppable. Walking through the streets and alleys to the park, leather shoes are spotless from morning to night. Locals proudly say their leather shoes don't rub for a month, and shirt collars don't get dark in a day.
Why is the air quality in Australia so good?
First of all, Australia's geographical location is unique and far away from neighbouring countries. Air pollutants from other countries sometimes "visit" across the ocean, but have little impact.
Second, Australia has a series of mandatory rules for greening, such as units and individuals responsible for greening in front of and around the country. If you don't, the government department will do it for you and send you the bill. Green to nature-based, there is no road, which street, is one-color tree species. A great deal of greening ensures the quality of the environment.
In addition, Australia also has a number of dust measures. In Sydney, Melbourne, Brisbane, Gold Coast and other places, whether public green areas or residential areas, roads can be seen with sawdust covering the roots.
Under the fitness facilities in public places, there are also sawdust coverings. Local people say sawdust covers topsoil to prevent dust and conserve water, create conditions for microbes to survive, turn sawdust into organic matter and provide nutrients for trees.
Speaking of which, friends may ask-what is China's position in the world's air quality ranking?
China ranked 177 on the list, surpassing only three countries-India, Bangladesh and Nepal. All three countries are next to China and are our nearest neighbors.
171. Myanma
172. Republic of the Congo
173. Laos
174. Tajikistan
175. Democratic Republic of the Congo
176. Pakistan
177. China
178. India
179. Bangladesh
180. Nepal
Most of the countries at the bottom of the list are African or Asian countries, and the changes over the past decade have tended to be regionalized.
Based on EPI data, we are deeply impressed by the air quality and overall environment in developed countries, but we are also concerned about air quality in many countries, including China. I hope that the relevant departments in various countries can continue to strengthen the control of air pollution, so that everyone can feel free to breathe!
